package org.atfeihu.springcloud.alibaba.controller;

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import lombok.extern.slf4j.Slf4j;
import org.atfeihu.springcloud.alibaba.service.PaymentService;
import org.atfeihu.springcloud.entities.CommonResult;
import org.atfeihu.springcloud.entities.Payment;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

/**
 * @author wangfeihu
 * @create 2021/9/12 15:50
 */
@RestController
@Slf4j
public class CircleBreakerController {

    @Value("${service-url.nacos-user-service}")
    private String SERVER_URL;

    @Resource
    private RestTemplate restTemplate;

    @Resource
    private PaymentService paymentService;

    @GetMapping("/consumer/fallback/{id}")
    @SentinelResource(value = "fallback", blockHandler = "blockHandler", fallback = "handlerFallback",
            exceptionsToIgnore = IllegalArgumentException.class)
    public CommonResult<Payment> fallback(@PathVariable Long id) {
        CommonResult<Payment> result = restTemplate.getForObject(SERVER_URL + "/paymentSQL/" + id, CommonResult.class);
        if (id == 4) {
            throw new IllegalArgumentException("IllegalArgumentException, 非法参数异常！");
        } else if (result.getData() == null) {
            throw new NullPointerException("NullPointerException, 该ID没有对应记录,空指针异常");
        }
        return result;
    }

    // fallback
    public static CommonResult handlerFallback(@PathVariable  Long id, Throwable e) {
        Payment payment = new Payment(id,"null");
        return new CommonResult<>(444,"兜底异常handlerFallback, exception内容: " + e.getMessage(), payment);
    }

    // blockHandler
    public static CommonResult blockHandler(@PathVariable  Long id, BlockException blockException) {
        Payment payment = new Payment(id,"null");
        return new CommonResult<>(445,"blockHandler-sentinel限流, 无此流水: blockException: " + blockException.getMessage(), payment);
    }


    @GetMapping("/consumer/paymentSQL/{id}")
    public CommonResult<Payment> paymentSQL(@PathVariable Long id) {
        return paymentService.paymentSQL(id);
    }
}
